Constraining the Milky Way assembly history with Galactic Archaeology

  title={Constraining the Milky Way assembly history with Galactic Archaeology},
  author={Ivan Minchev},
  journal={arXiv: Astrophysics of Galaxies},
  • I. Minchev
  • Published 1 July 2016
  • Physics
  • arXiv: Astrophysics of Galaxies
The aim of Galactic Archaeology is to recover the evolutionary history of the Milky Way from its present day kinematical and chemical state. Because stars move away from their birth sites, the current dynamical information alone is not sufficient for this task. The chemical composition of stellar atmospheres, on the other hand, is largely preserved over the stellar lifetime and, together with accurate ages, can be used to recover the birthplaces of stars currently found at the same Galactic… 

Galaxy simulations in the Gaia era

  • I. Minchev
  • Physics, Geology
    Proceedings of the International Astronomical Union
  • 2017
Abstract We live in an age where an enormous amount of astrometric, photometric, asteroseismic, and spectroscopic data of Milky Way stars are being acquired, many orders of magnitude larger than

The GALAH and GAIA surveys: the response of the Galactic disk to non-equilibrium features

The dynamical history of the Milky Way is complicated. We see a lot of substructure (that is likely accreted), both in spatial density, and in kinematics. The complexity varies, from simple streams

The K2 Galactic Caps Project – going beyond the Kepler field and ageing the Galactic disc

Analyses of data from spectroscopic and astrometric surveys have led to conflicting results concerning the vertical characteristics of the Milky Way. Ages are often used to provide clarity, but

Estimating stellar ages and metallicities from parallaxes and broadband photometry: successes and shortcomings

A deep understanding of the Milky Way galaxy, its formation and evolution requires observations of huge numbers of stars. Stellar photometry, therefore, provides an economical method to obtain

A Gaia DR2 view of the open cluster population in the Milky Way

Context. Open clusters are convenient probes of the structure and history of the Galactic disk. They are also fundamental to stellar evolution studies. The second Gaia data release contains precise

Stellar Mass Distribution and Star Formation History of the Galactic Disk Revealed by Mono-age Stellar Populations from LAMOST

We present a detailed determination and analysis of 3D stellar mass distribution of the Galactic disk for mono-age populations using a sample of 0.93 million main-sequence turnoff and subgiant stars

Mass and metallicity distribution of parent AGB stars of presolar SiC

The vast majority (≳90%) of presolar SiC grains identified in primitive meteorites are relics of ancient asymptotic giant branch (AGB) stars, whose ejecta were incorporated into the Solar System

Yule-Simpson’s paradox in Galactic Archaeology

Simpson’s paradox, or Yule–Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this

Characterising open clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution

Context. The Tycho-Gaia Astrometric Solution (TGAS) subset of the first Gaia catalogue contains an unprecedented sample of proper motions and parallaxes for two million stars brighter than G ~ 12

Local stellar kinematics from RAVE data—VIII. Effects of the Galactic disc perturbations on stellar orbits of red clump stars

We aim to probe the dynamic structure of the extended Solar neighborhood by calculating the radial metallicity gradients from orbit properties, which are obtained for axisymmetric and



The Gaia-ESO Survey: New constraints on the Galactic disc velocity dispersion and its chemical dependencies

Context. Understanding the history and the evolution of the Milky Way is one of the main goals of modern astrophysics. In particular, the formation of the Galactic disc is a key problem of Galactic

Pieces of the puzzle: ancient substructure in the Galactic disc

We search for signatures of past accretion events in the Milky Way in the recently published catalogue by Nordstrom et al., containing accurate spatial and kinematic information as well as

Evolution of the Milky Way with radial motions of stars and gas - I. The solar neighbourhood and the thin and thick disks

We study the role of radial migration of stars on the chemical evolution of the Milky Way disk. In particular, we are interested in the impact of that process on the local properties of the disk

Chemodynamical evolution of the Milky Way disk - I. The solar vicinity

[Abridged] In this first paper of this series, we present a new approach for studying the chemo-dynamical evolution in disk galaxies, which consists of fusing disk chemical evolution models with


The Galactic disk retains vast amount of information about how it came to be and how it evolved over cosmic time. However, we know very little about the secular processes associated with disk


The velocity dispersions of stars near the Sun are known to increase with stellar age, but age can be difficult to determine, so a proxy like the abundance of α elements (e.g., Mg) with respect to

Signatures of minor mergers in the Milky Way disc – I. The SEGUE stellar sample

It is now known that minor mergers are capable of creating structure in the phase-space distribution of their host galaxy’s disc. In order to search for such imprints in the Milky Way, we analyse the

The Galaxy in Context: Structural, Kinematic, and Integrated Properties

Our Galaxy, the Milky Way, is a benchmark for understanding disk galaxies. It is the only galaxy whose formation history can be studied using the full distribution of stars from faint dwarfs to

The Sagittarius impact as an architect of spirality and outer rings in the Milky Way

Simulation of the response of the Milky Way to the infall of the Sagittarius dwarf galaxy (Sgr), which results in the formation of spiral arms, influences the central bar and produces a flared outer disk, shows that the Milkyway’s morphology is not purely secular in origin and that low-mass minor mergers predicted to be common throughout the Universe probably have a similarly important role in shaping galactic structure.


We compare the spatial, kinematic, and metallicity distributions of stars in the Milky Way disk, as observed by the Sloan Digital Sky Survey and Geneva–Copenhagen Survey, to predictions made by